Hammer-lock.



T. WILD.

HAMMER LOCK. APPLICATION FILED szrms, I915.

1 ,1 90,970. Patented July 11, 1916.

THOMAS WILD, 0F LOWELL, MASSACHUSETTS.

HAMMER-LOCK.

Application filed September 15, 1915.

skilled in the art to which it appertains to,

make and use the same.

The primary object of this invention 1s to admit of a hammer head being securely and expeditiously locked to a hammer handle, and positively held against displacement.

Another object of the invention is to admit of the hammer head, if it should work loose, to be again secured and locked tothe hammer handle, by the same locking means.

Other objects will appear and be better understood from the embodiment of my invention of which the following is a specification, reference being had to the accompanying drawings forming a part thereof, in which:

Figure 1 is a side elevation of the hammer head showing the locking means secured thereto; Fig. 2 is a sectional detail view taken on the line 22 of Fig. 1; Fig. 3 is a plan view of the fastening or locking device removed from the hammer head.

Referring to the drawings, the letter A designates a hammer head, of ordinary construction, and B the hammer handle having one end tapered, as shown at C, adapted to fit in the handle receiving opening D in.

the hammer head.

The hammer head, has one side provided with a transversely extending opening 1, the opposite ends of which open into, respectively, the outer surface of the side of the hammer and into the handle receiving opening in the head of the hammer, the walls of the opening 1 being threaded as shown at 2.

Removably received by the opening 1 is the hammer locking device, which is formed of a straight threaded shank 3 adapted, as shown in Fig. 2, to have threaded engage- Specification of Letters Patent.

Serial No. 50,845.

ment with the threaded walls of the openmg 1, and having its upper end provided with a slot 4 for the reception of a. screw driver or similar tool, whereby the shank can be rotated within the opening to cause the same to travel toward or away from the adjacent end of the handle B, as is desired.

The lower inner end of the shank 3, .carrles a plate 5. This plate 5 is swivelly secured to the shank by means of a headed stud 6, the shank 7 of the stud being loosely received by an opening in the plate, and having its end extending into the shank 3. The plate 5 is provided with a plurality of depending spurs or prongs 8, which are arranged in spaced relation and are adapted to penetrate the adjacent surface of the handle as shown in Fig. 2.

In operation, the adjacent end of i the handle is inserted into the handle receiving opening in the hammer head and the shank 3 is inserted into the opening 1 in the side of the hammer head. The shank 3 is then turned by means of a screw driver or any other tool, in the'direction which will cause it to travel into the opening and toward the handle. The rotation of the shank is continued, resulting in the spurs 8 engaging the handle. Owing to the swiveled connection between the plate 5 and the shank, the plate will be held stationary during the rotation of the shank, and as the shank is moved downwardly the spurs or prongs will penetrate and engage in the handle resulting in the hammer head being locked in position on the handle. When it is desired to unlock the handle, the shank 3 is given retrograde rotation causing the plate and the prongs to move upwardly and away from the handle G, thereby admitting of the removal of the handle from the hammer head.

Having thus described my invention what I claim is: The combination with a hammer head having a handle-receiving opening therein and a transverse opening in one side thereof communicating with the handle receiving opening, the walls of the transverse open- Patented July 11, 1916.

ing being threaded, of a threaded shank adtransverse opening to be forced into the justably mounted Within the transverse handle. 1;

opening and having its inner ends provided In testimony whereof I aflix my signature with a stud, a plate associated With the inner in presence of two Witnesses.

' end of the shank and having an opening THOMAS WILD.

therein loosely receiving the stud, and hav- Witnesses: ing a plurality of depending spurs thereon JAMES E. ODONNELL, adapted when the shank is adjusted in the GEORGE Moss.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

